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Note 5 - Costs and Estimated Earnings and Billings on Uncompleted Contracts (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Excess Billings Over Earnings [Table Text Block] |
| As of December 31, |
| 2012 |  | 2011 |
Costs incurred and estimated earnings on uncompleted contracts |  | $ | 1,361,973 |  |  | $ | 997,527 |
Billings on uncompleted contracts |  |  | (1,360,299 | ) |  |  | (999,601 | )
Excess of costs incurred and estimated earnings over billings (excess of billings over costs incurred and estimated earnings) on uncompleted contracts |  | $ | 1,674 |  |  | $ | (2,074 | )
Schedule of Net Amount of Costs And Earnings on Uncompleted Contracts [Table Text Block] |
| As of December 31, |
|  | 2012 |  |  | 2011 |
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 20,592 |  |  | $ | 16,509 |
Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (18,918 | ) |  |  | (18,583 | )
Net amount of costs and estimated earnings on uncompleted contracts above (below) billings |  | $ | 1,674 |  |  | $ | (2,074 | )

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